Sheoldred, Whispering One [The List] Goblin Shaman You may cast a spell

You may cast a spell with mana value less than X from among them without paying its mana cost

untap that land

and it's returned from the battlefield to its owner's hand at the beginning of the next end step

They would be studied for generations

then put a +1/+1 counter on Grimgrin

Sheoldred, Whispering One [The List] Goblin Shaman You may cast a spellSet: The List Type: Legendary Creature Phyrexian Praetor Rarity: Mythic Cost: {5}{B}{B} Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.) At the beginning of your upkeep, return target creature card from your graveyard to the battlefield. At the beginning of each opponent's upkeep, that player sacrifices a creature.